Were all your other sessions contiguous? I think it has to be, but I'm not sure, and it might be good to know.
I've had a couple of sessions where I had sketchy connectivity, so I worried that I'd lose my progress - not sure how that works, exactly.
It has only been an issue this past Tuesday session. All other times, I have finished in full or have come back to finish and the minutes were there appropriately. I was logged into my account, so not sure why this Tuesday was an issue. Will see what happens Thursday.